GEOG 106 Lecture Notes - Lecture 25: Soil Horizon, Reforestation, Afforestation
Document Summary
Understory: forest floor & lowest levels of growth (give structure and habitat) Core: middle of a large forested area. Edge: edge of forested areas; differ in light levels, density of vegetation. Non- timber forest product (nftp): medicinal and herbal products, decorative, edibles. Clear- cutting: all trees in an area are cut, leaving only stump. New forestry: new approaches to timber cuts that mimic natural disturbances. Shelter wood: small number of mature trees standing to provide shelter for seedlings. Selection systems: allow un- even aged stand management (rotations of harvesting) Afforestation: the planting of trees where forested cover has not existed for some time (over. Maximum sustainable yield: argues for cutting trees after fastest age of growth. Uneven- aged: mix of ages and species make stand similar to natural forest. Rangelands: grasslands/wooded areas converted for the purpose of supporting livestock. Forestry/silviculture: must balance ecosystems with civilization"s demand for wood products.
